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//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 2.0, as
// published by the Free Software Foundation.
//
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// Without limiting anything contained in the foregoing, this file,
// which is part of MySQL Connector/NET, is also subject to the
// Universal FOSS Exception, version 1.0, a copy of which can be found at
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using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Storage;
using Microsoft.EntityFrameworkCore.Update;
using MySql.Data.EntityFrameworkCore.Infraestructure;
using System.Linq;

namespace MySql.Data.EntityFrameworkCore.Update
{
  /// <summary>
  /// IModificationCommandBatchFactory implemntation for MySQL
  /// </summary>
  internal class MySQLModificationCommandBatchFactory : IModificationCommandBatchFactory
  {
    private readonly IRelationalCommandBuilderFactory _commandBuilderFactory;
    private readonly ISqlGenerationHelper _sqlGenerator;
    private readonly MySQLUpdateSqlGenerator _updateSqlGenerator;
    private readonly IRelationalValueBufferFactoryFactory _valueBufferFactoryFactory;
    private readonly IDbContextOptions _options;

    public MySQLModificationCommandBatchFactory(
        [NotNull] IRelationalCommandBuilderFactory commandBuilderFactory,
        [NotNull] ISqlGenerationHelper sqlGenerator,
        [NotNull] IUpdateSqlGenerator updateSqlGenerator,
        [NotNull] IRelationalValueBufferFactoryFactory valueBufferFactoryFactory,
        [NotNull] IDbContextOptions options)
    {
      ThrowIf.Argument.IsNull(commandBuilderFactory, "commandBuilderFactory");
      ThrowIf.Argument.IsNull(updateSqlGenerator, "updateSqlGenerator");
      ThrowIf.Argument.IsNull(valueBufferFactoryFactory, "valueBufferFactoryFactory");
      ThrowIf.Argument.IsNull(options, "options");

      _commandBuilderFactory = commandBuilderFactory;
      _sqlGenerator = sqlGenerator;
      _updateSqlGenerator = (MySQLUpdateSqlGenerator)updateSqlGenerator;
      _valueBufferFactoryFactory = valueBufferFactoryFactory;
      _options = options;
    }

    public virtual ModificationCommandBatch Create()
    {
      var optionsExtension = _options.Extensions.OfType<MySQLOptionsExtension>().FirstOrDefault();

      return new MySQLModificationCommandBatch(
          _commandBuilderFactory,
          _sqlGenerator,
          _updateSqlGenerator,
          _valueBufferFactoryFactory,
          optionsExtension?.MaxBatchSize);
    }
  }
}
